Convert some component source sets to static library

components/metrics/BUILD.gn

 # Copyright 2014 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 declare_args() {
   # Overrides os name in uma metrics log to "Blimp".
   metrics_use_blimp = false
 }
 
 # These are only used by the blimp team, which has entirely migrated to gn,
@@ skipping 93 matching lines @@
     ]
   }
 
   if (is_win) {
     sources -= [ "machine_id_provider_stub.cc" ]
   }
 }
 
 if (!is_ios) {
   # GYP version: components/metrics.gypi:metrics_gpu
-  source_set("gpu") {
+  static_library("gpu") {
     sources = [
       "gpu/gpu_metrics_provider.cc",
       "gpu/gpu_metrics_provider.h",
     ]
 
     public_deps = [
       ":metrics",
     ]
     deps = [
       "//base",
@@ skipping 85 matching lines @@
   public_deps = [
     ":metrics",
   ]
   deps = [
     "//base",
     "//components/variations",
   ]
 }
 
 # GYP version: components/metrics.gypi:metrics_ui
-source_set("ui") {
+static_library("ui") {
   sources = [
     "ui/screen_info_metrics_provider.cc",
     "ui/screen_info_metrics_provider.h",
   ]
 
   public_deps = [
     ":metrics",
   ]
   deps = [
     "//base",
@@ skipping 136 matching lines @@
 
   if (is_linux) {
     sources += [ "serialization/serialization_utils_unittest.cc" ]
     deps += [ ":serialization" ]
   }
 
   if (is_chromeos) {
     deps += [ ":leak_detector_unit_tests" ]
   }
 }